Midwest Vintage Racing
RELIC CLASS
1973 and older, production line model with a single cylinder fan cooled motor. No changes or modification allowed unless specified by these rules. If these rules do not specifically allow a change or modification, it is assumed that the change or modification is NOT allowed.
Engines:
- Engines must have been offered in the model of sled you are running!
- Motors not allowed: Yamaha, Kawasaki ,Hirth 338, Sachs sa290c, sa290ss, sa290R, sa320,sa340SS, sa340C,
sa340, sa340R, sa368 with HD carb, sa400, JLO 290R/ 340R, Rotax 292 TNT and 340 TNT
- Carb must be HR size carb or smaller. You can replace an HD carbureted motor with and HR as long as the motor
is within the acceptable motors list.
(Example- a 69 Panther can run a 368 Sachs but the carb has to be changed to an HR size)
- Carb must be original or other diaphragm carb with 2 1/4 inch bolt pattern (no aftermarket or billet carbs)
- Engines must remain stock, no grinding, porting, sandblasting, shaving on anything.
- Pistons can be stock or aftermarket replacement, no cutting skirts. ( Max over bore .150)
- Primary Clutch stock 1976 and older standard production. (must be brand specific) or 94 c dusters or Power Block allowed.
- Engine must have OEM point ignition. (no cdi)
- Must have recoil.
- No fuel pumps allowed unless it was factory with the sled.
- None Ethanol gasoline and race gasoline only, NO E-85, Alcohol, Nitro Methane or any other fuel allowed.
- Exhaust and muffler must be stock or stock replacement. Head pipe may not exceed 2”OD. No tuners!
- If the head pipe exceeds 2” the exhaust must be stock to year, make and model of sled and may not be altered.
Fuel Tank:
- Fuel tanks must be stock to manufacture of sled 1976 or Older, Mounted in stock location and must not exceed 6 gal. No aftermarket or homemade tanks
Chassis:
- 1973 and older, no limited production or race chassis. NO jackshaft chassis. (Panther chassis only)
- Bulkhead must be stock and unaltered. Reinforcement and bracing only.
- Skis must be original or stock replacement. No Aluminum or unsafe skis. Any carbide allowed
- You must run a hood and belly pan.
- 24” Leaf Spring minimum Length.
- Ski spreaders allowed max 2.5” measured from center of spindle to center of ski.
- Any spindle allowed but must fit in stock unaltered bulk head.
- Numbers must be 8” and visible on both sides (Should be black and white)
- Any seat may be used and any handle bars.
- Your brakes must be in working condition (Will be checked)
- Brake may be moved from stock location and relocated (IE Extended Drive Shaft with disc) May use hydraulic brake setup off of newer sled.
- Must have a working tether cord and USE it. Must be mounted to the frame not handle bars
- Snow flap must touch ice/snow with rider on machine.
Suspension and track:
- Suspension can only be from a 73 and older sled of the same model. No modifications allowed except reinforcement. If it came with bogies you must run bogies
- Tracks must be 73 or older and no modifications allowed, NO Light weight tracks. Cleated tracks must remain cleated, rubber must remain rubber.
- No aluminum or titanium cleats
- Track Studs can measure a maximum of 1⁄2” max past cleat or lug. Will be checked with gauges.
No changes or modification allowed unless specified by these rules. If these rules do not
specifically allow a change or modification, it is assumed that the change or modification is not allowed.